BlackRock signaled its willingness to engage in a price war last October by cutting fees on 15 ETFs, going head-to-head with faster-growing ETF rivals Vanguard and Charles Schwab in the fight for investors flocking to passive products. “A new era is dawning for advisers and long-term investors,” Mark Wiedman, global head of iShares, BlackRock’s $1.4 trillion ETF